Solve the following system by hand. Clearly show your work for full credit. x + y = 5 x – y = 1

The average weekly savings of David and Andrew is $22. If David's and Edward's average weekly saving is $25, how much less does Andrew save than Edward?

Lily borrowed a total of $10,000. She borrowed part of the money from her friend Sly who did not charge her interest. She borrowed part of the money from a credit union at 5% simple interest, and she borrowed the rest of the money from a bank at 7.5% interest. At the end of 1 yr, she owed $500 in interest. If she borrowed $1000 less from her friend than she did from the bank, determine how much she borrowed from each source.

A clock manufacturer's fixed costs per month are $8000. The unit cost for each clock is $15. Find the number of clocks made during a month in which the total cost was $38,000. Use the formula T = UN + F, where T is the total cost, U is the cost per unit, N is the number of units made, and F is the fixed costs.

A total of $6000 is invested for 5 yr with a total return of $1080. Part of the money is invested in a fund that returns the equivalent of 2% simple interest. The rest of the money is invested at 4% simple interest. Determine the amount invested in each account.

Please answer the following questions

Daniella's gross monthly earnings are based on commission rates of 4% on the first $40,000 of sales, 5% on the next $50,000, and 6% on all additional sales for the month.What is her sales total for a month in which she earns $5350? (Round your answer to the nearest cent.)  Total sales for the month =

x + 10 1x -x = 18 %3D 20 215